BACKGROUND Gastrointestinal system (GIS) malignancy with pregnancy is a very rare condition and is not common outside Japan. The incidence is between 0.025-0.1% for each pregnancy. GIS malignancies are diagnosed late in pregnancy and detected at an advanced stage. The most common cause of this condition is that the symptoms such as vomiting, nausea, loss of appetite and abdominal growth are mistaken with pregnancy and malignancy is overlooked. Especially in the second trimester, symptoms such as nausea and vomiting, weight loss, melena, hematemesis and deep anemia should suggest malignancy. Upper GIS endoscopy and colonoscopy are the recommended screening methods in these patients, especially in the third trimester. CASE PRESENTATION We present a rare case presenting to our emergency room with the complaint of bloody vomiting, at the 36th week of gestation with a live singleton pregnancy, and receiving the diagnosis of undifferentiated gastric carcinoma from the biopsy taken from the ulcerated lesion on the stomach cardia, with upper GIS endoscopy performed due to deep anemia, who underwent simultaneous cesarean section and subtotal gastrectomy. CONCLUSION Gastrointestinal system (GIS) malignancy with pregnancy is a very rare condition, but it should be considered when symptoms such as nausea and vomiting, weight loss, melena, hematemesis and deep anemia occur, especially in the second trimester, and endoscopic screening should be recommended. Because of the delay in diagnosis of malignancy and the detection in advanced stages, patients should be referred for treatment without delay.

中文翻译：

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罕见病例：妊娠和胃癌。

背景技术孕期胃肠系统恶性肿瘤是一种非常罕见的疾病，在日本以外并不常见。每次怀孕的发生率在0.025-0.1％之间。GIS恶性肿瘤在妊娠晚期被诊断出来，并在晚期被发现。引起这种情况的最常见原因是怀孕误认为​​诸如呕吐，恶心，食欲不振和腹部生长等症状，而忽视了恶性肿瘤。特别是在妊娠中期，恶心和呕吐，体重减轻，黑便，呕血和深度贫血等症状应提示恶性。在这些患者中，尤其是在妊娠晚期，建议使用上层GIS内窥镜和结肠镜检查。案例介绍我们向急诊室介绍了一个罕见案例，其中涉及血腥呕吐，在妊娠第36周进行单胎妊娠并从胃from门溃疡病变的活组织检查中诊断出未分化的胃癌，由于深部贫血进行了上GIS内窥镜检查，并同时进行了剖宫产和小计胃切除术。结论胃肠道系统恶性肿瘤伴妊娠是一种非常罕见的疾病，但在出现恶心和呕吐，体重减轻，黑便，呕血和深层贫血等症状时应予以考虑，尤其是在妊娠中期，应进行内镜检查推荐的。由于恶性肿瘤的诊断和晚期检测的延迟，应立即转诊患者。并从胃card门溃疡性病变的活检中诊断出未分化的胃癌，并由于深部贫血而进行了上GIS内镜检查，并同时进行了剖宫产和次全胃切除术。结论胃肠道系统恶性肿瘤伴妊娠是一种非常罕见的疾病，但在出现恶心和呕吐，体重减轻，黑便，呕血和深层贫血等症状时应予以考虑，特别是在妊娠中期，应进行内镜检查推荐的。由于恶性肿瘤的诊断和晚期检测的延迟，应立即转诊患者。并从胃card门溃疡性病变的活检中诊断出未分化的胃癌，并由于深部贫血而进行了上GIS内镜检查，并同时进行了剖宫产和次全胃切除术。结论胃肠道系统恶性肿瘤伴妊娠是一种非常罕见的疾病，但在出现恶心和呕吐，体重减轻，黑便，呕血和深层贫血等症状时应予以考虑，特别是在妊娠中期，应进行内镜检查推荐的。由于恶性肿瘤的诊断和晚期检测的延迟，应立即转诊患者。谁同时进行剖宫产和次全胃切除术。结论胃肠道系统恶性肿瘤伴妊娠是一种非常罕见的疾病，但在出现恶心和呕吐，体重减轻，黑便，呕血和深层贫血等症状时应予以考虑，特别是在妊娠中期，应进行内镜检查推荐的。由于恶性肿瘤的诊断和晚期检测的延迟，应立即转诊患者。谁同时进行剖宫产和次全胃切除术。结论胃肠道系统恶性肿瘤伴妊娠是一种非常罕见的疾病，但在出现恶心和呕吐，体重减轻，黑便，呕血和深层贫血等症状时应予以考虑，尤其是在妊娠中期，应进行内镜检查推荐的。由于恶性肿瘤的诊断和晚期检测的延迟，应立即转诊患者。并建议进行内镜检查。由于恶性肿瘤的诊断和晚期检测的延迟，应立即转诊患者。并建议进行内镜检查。由于恶性肿瘤的诊断和晚期检测的延迟，应立即转诊患者。